Is it normal to fantasize about being with other girls?

What you are is selfish.

It's normal, doesn't mean it's right.

I think its normal, I think most men do it, my bf told me about wanting to be with other women so I started letting him and our relationship is great. men have needs and its just natural

Totally normal I love female company more fun and can chat openly

Maximum guys ( married / unmarried) jerk off by fantasising different girl but never admit. It has always got something extraordinary enjoyment to watch different girl's naked or even eating a different girl. Married guys always want to taste different pussies. Many guys enjoy sex with different girl. It is not a crime. Love and sex is two different things. When a guy take his cock in his hand and rubb his cock he always fantasise different girls. When he started jerking off he imagine different girl's face and imagine their pussy and start doing dirty things with those girls in imagination. It is common and natural. Every guys do this. The may be his friend' s sister or frnds mom. May be his relatives. Diring jerking off there is no limit of imagination or fantasy. Right now my close frnd may jerking off fantasising my sister.

In my opinion most guys fantasize about shagging other women

Don't act on it unless you and your wife agree on a polygamous relationship. Just don't cheat behind her back.

It could get really hot if your wife is willing to let you fulfill your fantasy. She might even like the idea of her and a younger stud. Have fun and enjoy.